xprtrdma: Sanitize the reply credit grant after parsing

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72465
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:20 UTC
Updated2026-08-15 06:22:20 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: xprtrdma: Sanitize the reply credit grant after parsing The out_norqst exit in rpcrdma_reply_handler() branches away before the credit clamp, so a reply that matches no pending request reaches out_post carrying the raw credit value parsed from the wire. rpcrdma_post_recvs() does not bound its @needed argument: the refill loop allocates and chains Receive WRs until the count is satisfied or allocation fails. A peer that sends a well-formed reply carrying an unknown XID and an inflated credit grant therefore drives rep allocation and Receive posting past re_max_requests on every such reply. Move the clamp to immediately after the credit field is parsed, ahead of the first branch that can reach out_post, so every later consumer sees a sanitized value. The cwnd update stays on the matched-request path.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d01d6670c169316115b26dfb3585a73dfe40b563 7cf332b3d82d73ffceedca6b4a120be074172021 git Not specified
CNA Linux Linux affected d1b159356a3584943192712392fcb2439aafb8c1 41634242140173eabbf54f899f9c70b5c685e786 git Not specified
CNA Linux Linux affected 17da9e0caa8615f6fc3b4022eadbd78a9aea1a2a 8be1bb378def94a5cb8f7527a191e476407118ec git Not specified
CNA Linux Linux affected e7ae0883c8c89b901226de43862184bf37054338 469b22376ee73369711ecf2761bd122ef4195963 git Not specified
CNA Linux Linux affected 704f3f640f72db4d44ec5ce3db8d4e150c974bc7 33db78b1b24fc6a464ae08aa4d2538c5f883eb5e git Not specified
CNA Linux Linux affected 704f3f640f72db4d44ec5ce3db8d4e150c974bc7 c3a628aab2dc8f5fd7bff86ceaeae64de590e60a git Not specified
CNA Linux Linux affected 7.1 Not specified
CNA Linux Linux unaffected 7.1 semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/33db78b1b24fc6a464ae08aa4d2538c5f883eb5e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7cf332b3d82d73ffceedca6b4a120be074172021 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c3a628aab2dc8f5fd7bff86ceaeae64de590e60a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/41634242140173eabbf54f899f9c70b5c685e786 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/469b22376ee73369711ecf2761bd122ef4195963 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8be1bb378def94a5cb8f7527a191e476407118ec 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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